Abstract: In a procedure for controlling gear shifting of a subtransmission which can be carried out only when a vehicle is substantially standing, a vehicle speed pulse is generated, a time is counted from the time each vehicle speed pulse is generated (steps 101, 102). This time is a period for which a first condition by which the vehicle can be considered, regardless of the pulse, to be running is satisfied. At the same time the first condition becomes unsatisfied from a satisfied state, the counted time is determined to be a first condition satisfied period T1, and a waiting period Tw is determined in a predetermined manner by using the first condition satisfied period (step 103). A time T2 is counted from the time the first condition becomes unsatisfied, and when the counted time T2 reaches the determined waiting period, the gear shifting of the subtransmission becomes possible (step 105).

Abstract: In a procedure for controlling gear shifting of a subtransmission which can be carried out only when a vehicle is substantially standing, a vehicle speed pulse is generated, a time is counted from the time each vehicle speed pulse is generated (steps 101, 102). This time is a period for which a first condition by which the vehicle can be considered, regardless of the pulse, to be running is satisfied. At the same time the first condition becomes unsatisfied from a satisfied state, the counted time is determined to be a first condition satisfied period T1, and a waiting period Tw is determined in a predetermined manner by using the first condition satisfied period (step 103). A time T2 is counted from the time the first condition becomes unsatisfied, and when the counted time T2 reaches the determined waiting period, the gear shifting of the subtransmission becomes possible (step 105).

Abstract: The operation device of a transmission in accordance with the present invention has a lock mechanism which can lock a shift rod in either a high speed range or a low speed range in a transfer in response to a detection signal when a control lever is positioned at a parking range, and has also alarm means for raising an alarm in response to a detection signal when the transfer is at a neutral position. When a vehicle is parked with the control lever being in the parking range, a driver can recognize the state of the transfer by the alarm if the transfer is at the neutral position, and shifts the shift rod to the high or low speed range by operating the transfer lever. The lock mechanism operates in the high or low speed range and a full driving system is connected so that the vehicle can be kept stopped and self-run of the vehicle on a slope or the like can be prevented.